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Proceedings Paper

Three-dimensional range information from single-frame incoherently illuminated images
Author(s): W. Thomas Cathey; Edward R. Dowski
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Paper Abstract

A system is described that will give the range to different portions of a scene. The optical system is modified such that the optical transfer function has periodic nulls, with the period of the nulls depending on the axial distance within the volume of the 3D scene. These same nulls appear in the spatial frequency spectrum of the images of objects that are at different distances within the volume of the scene. Estimation of the period of the nulls in the spatial frequency spectrum of the image then gives the ranges to different objects within the scene. A similar optical/digital processing technique is used to extend the depth of field of the composite system so that it will work over larger changes in range.

Paper Details

Date Published: 27 March 1995
PDF: 7 pages
Proc. SPIE 2423, Machine Vision Applications in Industrial Inspection III, (27 March 1995); doi: 10.1117/12.205503
Show Author Affiliations
W. Thomas Cathey, Univ. of Colorado/Boulder (United States)
Edward R. Dowski, Univ. of Colorado/Boulder (United States)


Published in SPIE Proceedings Vol. 2423:
Machine Vision Applications in Industrial Inspection III
Frederick Y. Wu; Stephen S. Wilson, Editor(s)

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